Every leader I know has a story of a setback. Leaders are defined – not defeated – by setbacks. The truth is, it’s not rejection or failure that holds us back, it’s the way we choose to respond. And ultimately, it’s what we choose to do in a tough situation that enables us to realize our potential to succeed. A few years ago I heard Arianna Huffington say, “Failure is not the opposite of success; it’s a stepping stone to success.”And I couldn’t agree more.